const http = require("http");
const cheerio = require("cheerio");
const url = require("url");
const fs = require("fs");
const path = require("path");
const https = require("https");

var reqUrl = "https://maoyan.com/films?showTypes=3";
var movieList = [];

//收到请求时，把网页响应过去
//https://localhost:8081/
//将*.html文件响应过去
http.createServer((req,res)=>{
    var urlObj = url.parse(req.url);
    var pathname = urlObj.pathname;
    if(pathname == "/"){
        var filePath = path.join(__dirname,"/index.html");
        fs.readFile(filePath, (err,data)=>{
            if(err){
                console.log(err)
            }else{
                res.writeHead(200,{"Content-Type":"text/html;charset=utf8"})
                res.write(data);
                res.end();
            }
        })
    }
    else if(pathname == "/getlist"){
        https.get(reqUrl,(resObj)=>{
            var htmlStr = "";
            resObj.on("data",(chunk)=>{
                htmlStr += chunk;
            })
            resObj.on("end",()=>{
                var $ = cheerio.load(htmlStr);
                $(".movie-item-title a").each((i,el)=>{
                    var movieName = $(el).text();
                    var movieId = $(el).attr("data-val");
                    movieId = movieId.slice(movieId.indexOf(":")+1,-1);
                    var num1 = $(el).parent().next().children(".integer").text();
                    var num2 = $(el).parent().next().children(".fraction").text();
                    var rate = num1 + '.' + num2;
                    var movieObj = {movieId: movieId, movieName: movieName, rate: rate};
                    movieList.push(movieObj);
                })

                res.writeHead(200, {"Content-Type": "text/plain"});
                res.write(JSON.stringify(movieList));
                res.end();
            })
        })
    }
}).listen(8081);